Possible packet loss - Any ideas?

[Sandcastle]

Recently been having a lot of packet loss, no idea how to see what's causing it, this is all over a wired ethernet connection. Anyone can check over this and see if everythings working how it should? - Not sure what other info is required so if anythings needed I can provide it. 

5	171000000	7	40.9	QAM256	5
1	139000000	7.2	39	QAM256	1
2	147000000	7.7	39	QAM256	2
3	155000000	7.8	38.6	QAM256	3
4	163000000	7.4	40.4	QAM256	4
6	179000000	6.7	40.4	QAM256	6
7	187000000	6.7	40.4	QAM256	7
8	195000000	6.6	39	QAM256	8
9	203000000	6.4	38.6	QAM256	9
10	211000000	6.6	38.6	QAM256	10
11	219000000	6.4	39	QAM256	11
12	227000000	6.2	39	QAM256	12
13	235000000	6	38.6	QAM256	13
14	243000000	5.6	38.6	QAM256	14
15	251000000	5.2	39	QAM256	15
16	259000000	5.3	39	QAM256	16
17	267000000	5	38.6	QAM256	17
18	275000000	5	39	QAM256	18
19	283000000	5.1	39	QAM256	19
20	291000000	5.1	37.4	QAM256	20
21	299000000	5.2	37.6	QAM256	21
22	307000000	4.7	37.6	QAM256	22
23	315000000	4.5	37.6	QAM256	23
24	323000000	4.9	38.6	QAM256	24
25	331000000	4.8	38.6	QAM256	25
26	339000000	4.7	38.6	QAM256	26
27	347000000	4.8	38.6	QAM256	27
28	355000000	4.2	38.6	QAM256	28
29	363000000	4.3	38.6	QAM256	29
30	371000000	4.3	37.6	QAM256	30
31	379000000	4.3	38.6	QAM256	31

[jbrennand]

What devices have you got connected to the Hub on ethernet cables? Is the Hub in normal router mode or is it in modem mode?

Post up the rest of the data thus...
___________________________

Navigate to these “data pages” and just copy/paste the normal “Formatted Text” (not images) 3 FULL sets of data onto here – 2 tables from the Downstream, 2 from the Upstream, & the Network Logs page. Don't worry too much about the formatting it can be easily read & DON’T include personal data or MAC addresses - blank them out - if you copy/paste the data, the board software will do this for you (you may need to click the "submit" button again). If character limits are “exceeded” - just do two posts

[Sandcastle]

Lots of ethernet devices, two ethernet switches. TV's, computers, etc. Router is in normal router mode. 

3.0 Downstream channels
Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID
5 171000000 7.1 40.4 QAM256 5
1 139000000 7.2 39 QAM256 1
2 147000000 7.7 39 QAM256 2
3 155000000 7.8 39 QAM256 3
4 163000000 7.4 40.4 QAM256 4
6 179000000 6.8 40.4 QAM256 6
7 187000000 6.7 40.4 QAM256 7
8 195000000 6.5 39 QAM256 8
9 203000000 6.4 39 QAM256 9
10 211000000 6.6 39 QAM256 10
11 219000000 6.4 38.6 QAM256 11
12 227000000 6.2 39 QAM256 12
13 235000000 5.9 39 QAM256 13
14 243000000 5.6 39 QAM256 14
15 251000000 5.1 38.6 QAM256 15
16 259000000 5.3 39 QAM256 16
17 267000000 5 39 QAM256 17
18 275000000 5 38.6 QAM256 18
19 283000000 5.1 38.6 QAM256 19
20 291000000 5.1 37.6 QAM256 20
21 299000000 5.2 37.4 QAM256 21
22 307000000 4.7 37.6 QAM256 22
23 315000000 4.6 37.6 QAM256 23
24 323000000 5 38.6 QAM256 24
25 331000000 4.7 39 QAM256 25
26 339000000 4.8 38.6 QAM256 26
27 347000000 4.8 38.6 QAM256 27
28 355000000 4.3 38.6 QAM256 28
29 363000000 4.3 38.6 QAM256 29
30 371000000 4.2 37.6 QAM256 30
31 379000000 4.3 38.6 QAM256 31



3.0 Downstream channels
Channel Lock Status RxMER (dB) Pre RS Errors Post RS Errors
5 Locked 40.366287 0 0
1 Locked 38.983261 0 0
2 Locked 38.983261 0 0
3 Locked 38.983261 0 0
4 Locked 40.366287 0 0
6 Locked 40.366287 0 0
7 Locked 40.366287 0 0
8 Locked 38.983261 0 0
9 Locked 38.983261 0 0
10 Locked 38.983261 0 0
11 Locked 38.605377 0 0
12 Locked 38.983261 0 0
13 Locked 38.983261 0 0
14 Locked 38.983261 0 0
15 Locked 38.605377 0 0
16 Locked 38.983261 0 0
17 Locked 38.983261 0 0
18 Locked 38.605377 0 0
19 Locked 38.605377 0 0
20 Locked 37.636276 0 0
21 Locked 37.355988 0 0
22 Locked 37.636276 0 0
23 Locked 37.636276 0 0
24 Locked 38.605377 0 0
25 Locked 38.983261 0 0
26 Locked 38.605377 0 0
27 Locked 38.605377 0 0
28 Locked 38.605377 0 0
29 Locked 38.605377 0 0
30 Locked 37.636276 0 0
31 Locked 38.605377 0 0



3.1 Downstream channels
Channel Channel Width (MHz) FFT Type Number of Active Subcarriers Modulation (Active Profile) First Active Subcarrier (Hz)
159 96 4K 1880 QAM4096 759


3.1 Downstream channels
Channel ID Lock Status RxMER Data (dB) PLC Power (dBmV) Correcteds (Active Profile) Uncorrectables (Active Profile)
159 Locked 41 5.5 3524994234 363


3.0 Upstream channels
Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID
1 49600000 44 5120 KSym/sec 64QAM 1
2 23600000 43.5 5120 KSym/sec 64QAM 5
3 30100000 43.5 5120 KSym/sec 64QAM 4
4 36600000 43.5 5120 KSym/sec 64QAM 3
5 43100000 43.5 5120 KSym/sec 64QAM 2



3.0 Upstream channels
Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts
1 US_TYPE_STDMA 0 0 0 0
2 US_TYPE_STDMA 0 0 1 0
3 US_TYPE_STDMA 0 0 0 0
4 US_TYPE_STDMA 0 0 0 0
5 US_TYPE_STDMA 0 0 0 0



3.1 Upstream channels
Channel Channel Width (MHz) Power (dBmV) FFT Type Modulation
6 10.0 38.0 2K QAM8


3.1 Upstream channels
Channel Channel Type Number of Active Subcarriers First Active Subcarrier (Hz) T3 Timeouts T4 Timeouts
6 OFDMA 200 53.9 0 0

[jbrennand]

Right - all stats look good - see this...
______________________________

There is another option, there have been several threads on here recently where similar BQM latency/packet loss problems were eventually pinned down to a dodgy piece of connected kit affecting the connection . Bad connectors on ethernet cables and faulty network switches being high on the list of suspects

What I advised was... if you run the BQM for ~24h to get a picture of the issues (you have done this) - and then unplug all the ethernet cable connections from the Hub and just let it run - so overnight is best

Then in the morning, look at the BQM and see if it has cleaned up. If it has - plug the devices back in one at a time, leave for an hour or two until the packet drop reappears and that should indicate where to look for what is causing the issues

If you replace cables first - get Cat6a ones as they have better shielding to protect from crosstalk in the connectors and electrical interference.

Examples.
See message 21 in the first thread - and 13 in the second.

https://community.virginmedia.com/t5/Networking-and-WiFi/Internet-connection-dropping/td-p/4781287/p...

https://community.virginmedia.com/t5/Networking-and-WiFi/Intermittent-Connection/td-p/5069984/page/2